V13801 2021 - Tomie Wants To Get Married Expansion

The mention of "wants to get married" and an "expansion" suggests that the content you're referring to might be a part of a visual novel, a game, or possibly a fan-made expansion or mod for such a game. Visual novels and certain types of games often have expansion packs or updates (denoted by version numbers like "v1.38.01") that add new storylines, characters, or gameplay mechanics.